I voted for "For All Tid". Maybe the epic desolate frozen cover artwork played its role to transfer this kind of music to my young (then) ears, and it is among my favorites.
I have the impression that very few will understand this statement, so here we go:
Note: Agony (by Psygnosis, for Amiga) was released 4 years earlier than Stormblåst. The theme song is by Tim Wright, a classically themed, piano-led instrumental. The title song was adapted without giving him proper credit by the keyboardist of Dimmu Borgir in the song "Sorgens Kammer" for their Stormblåst album. The band did not know about this. Following several months of communication between Wright and Dimmu Borgir, and in a nod to the composer, the band did not include the track on a later re-recording of Stormblåst.